Why would I believe such a thing when I already explained my reasoning from the scripture and even translated the critical portion of the statement in the passage in question from the OP?
ἄρτι - just now, right now, at this moment
ἕως ἄρτι - until just now, until right now, until this moment
The seventh hour:
John 4:5-7 ASV
5 So he cometh to a city of Samaria, called Sychar, near to the parcel of ground that Jacob gave to his son Joseph:
6 and Jacob's well was there. Jesus therefore, being wearied with his journey, sat thus by the well.
It was about the sixth hour.
7 There cometh a woman of Samaria to draw water: Jesus saith unto her, Give me to drink.
John 4:19-24 ASV
19 The woman saith unto him, Sir, I perceive that thou art a prophet.
20 Our fathers worshipped in this mountain; and ye say, that in Jerusalem is the place where men ought to worship.
21 Jesus saith unto her, Woman, believe me,
the hour cometh, when neither in this mountain, nor in Jerusalem, shall ye worship the Father.
22 Ye worship that which ye know not: we worship that which we know; for salvation is from the Jews.
23
But the hour cometh,
and now is, when the true worshippers shall worship the Father in spirit and truth: for such doth the Father seek to be his worshippers.
24 God is a Spirit: and they that worship him must worship in spirit and truth.
In the above the observant reader will see that the seventh hour commenced as they spoke, and therefore the Master says, "the hour comes, and now is", and this is surely the meaning because we are told at the commencement of the passage that when he arrived at the well "it was about the sixth hour". And what comes next in the passage as already noted previously herein in this thread?
The seventh hour:
John 4:46-53 ASV
46 He came therefore again unto Cana of Galilee, where he made the water wine. And there was a certain nobleman, whose son was sick at Capernaum.
47 When he heard that Jesus was come out of Judæa into Galilee, he went unto him, and besought him that he would come down, and heal his son; for he was at the point of death.
48 Jesus therefore said unto him, Except ye see signs and wonders, ye will in no wise believe.
49 The nobleman saith unto him, Sir, come down ere my child die.
50 Jesus saith unto him, Go thy way; thy son liveth. The man believed the word that Jesus spake unto him, and he went his way.
51 And as he was now going down, his servants met him, saying, that his son lived.
52
So he inquired of them the hour when he began to amend.
They said therefore unto him,
Yesterday at the seventh hour the fever left him.
53 So the father knew that it was
at that hour in which Jesus said unto him, Thy son liveth: and himself believed, and his whole house.
And what comes immediately following these things in the very next passage?
The seventh hour Shabbat:
My Father works until this moment, just now, right now, (ἕως ἄρτι - John 5:17).
I have not changed the text to suit my own fanciful theory concerning the Shabbat: these things I understood from the scripture well before I actually understood John 5:17, and in fact I only came to understand the statement in John 5:17 because of the understanding of the Shabbat as taught by the Master himself in the Gospel accounts, (and there is much more than these basic, simple, preliminary things).
These things are expounding the correct understanding of the Torah: specifically, in this case, the Shabbat hour which is the seventh hour of the sacred calendar day laid out in the opening creation account. Yom is Light, for that is what Elohim calls the Light, (Yom, Gen 1:5). That is not the same as "Day", for we have teachings concerning these things in other scripture passages. If one day with the Master is as a thousand years, and a thousand years is as one day, then a yom may either be a day or a thousand years.
Moreover, when the spies brought back an evil report upon the land, what was the breach of promise? It was a year for a day, forty years in the wilderness, and therefore a yom may also be a year, a year for a day. And when the Prophet Ezekiel is commanded to lay on his sides, a certain amount of days for Yisrael, and a certain amount of days for Yhudah, it is a day for a year. If therefore a yom may be a day, and a yom may be a year, and a yom may be a thousand years, then no doubt a yom may also be an hour: for Yom is Light according to the Word of Elohim in Genesis 1:5. Whenever therefore yom is used for an increment of time it may be any increment of time,
depending on the context, for Yom is Light.